main.c revision 1.16
1 /* $NetBSD: main.c,v 1.16 1998/07/12 03:20:14 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\n\ 39 Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94"; 45 #else 46 __RCSID("$NetBSD: main.c,v 1.16 1998/07/12 03:20:14 mrg Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/protosw.h> 53 #include <sys/socket.h> 54 55 #include <netinet/in.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <errno.h> 60 #include <kvm.h> 61 #include <limits.h> 62 #include <netdb.h> 63 #include <nlist.h> 64 #include <paths.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include "netstat.h" 70 71 struct nlist nl[] = { 72 #define N_MBSTAT 0 73 { "_mbstat" }, 74 #define N_IPSTAT 1 75 { "_ipstat" }, 76 #define N_TCBTABLE 2 77 { "_tcbtable" }, 78 #define N_TCPSTAT 3 79 { "_tcpstat" }, 80 #define N_UDBTABLE 4 81 { "_udbtable" }, 82 #define N_UDPSTAT 5 83 { "_udpstat" }, 84 #define N_IFNET 6 85 { "_ifnet" }, 86 #define N_IMP 7 87 { "_imp_softc" }, 88 #define N_ICMPSTAT 8 89 { "_icmpstat" }, 90 #define N_RTSTAT 9 91 { "_rtstat" }, 92 #define N_UNIXSW 10 93 { "_unixsw" }, 94 #define N_IDP 11 95 { "_nspcb"}, 96 #define N_IDPSTAT 12 97 { "_idpstat"}, 98 #define N_SPPSTAT 13 99 { "_spp_istat"}, 100 #define N_NSERR 14 101 { "_ns_errstat"}, 102 #define N_CLNPSTAT 15 103 { "_clnp_stat"}, 104 #define IN_NOTUSED 16 105 { "_tp_inpcb" }, 106 #define ISO_TP 17 107 { "_tp_refinfo" }, 108 #define N_TPSTAT 18 109 { "_tp_stat" }, 110 #define N_ESISSTAT 19 111 { "_esis_stat"}, 112 #define N_NIMP 20 113 { "_nimp"}, 114 #define N_RTREE 21 115 { "_rt_tables"}, 116 #define N_CLTP 22 117 { "_cltb"}, 118 #define N_CLTPSTAT 23 119 { "_cltpstat"}, 120 #define N_NFILE 24 121 { "_nfile" }, 122 #define N_FILE 25 123 { "_file" }, 124 #define N_IGMPSTAT 26 125 { "_igmpstat" }, 126 #define N_MRTPROTO 27 127 { "_ip_mrtproto" }, 128 #define N_MRTSTAT 28 129 { "_mrtstat" }, 130 #define N_MFCHASHTBL 29 131 { "_mfchashtbl" }, 132 #define N_MFCHASH 30 133 { "_mfchash" }, 134 #define N_VIFTABLE 31 135 { "_viftable" }, 136 #define N_MSIZE 32 137 { "_msize" }, 138 #define N_MCLBYTES 33 139 { "_mclbytes" }, 140 #define N_DDPSTAT 34 141 { "_ddpstat"}, 142 #define N_DDPCB 35 143 { "_ddpcb"}, 144 { "" }, 145 }; 146 147 struct protox { 148 u_char pr_index; /* index into nlist of cb head */ 149 u_char pr_sindex; /* index into nlist of stat block */ 150 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 151 void (*pr_cblocks) /* control blocks printing routine */ 152 __P((u_long, char *)); 153 void (*pr_stats) /* statistics printing routine */ 154 __P((u_long, char *)); 155 void (*pr_dump) /* PCB state dump routine */ 156 __P((u_long)); 157 char *pr_name; /* well-known name */ 158 } protox[] = { 159 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 160 tcp_stats, tcp_dump, "tcp" }, 161 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 162 udp_stats, 0, "udp" }, 163 { -1, N_IPSTAT, 1, 0, 164 ip_stats, 0, "ip" }, 165 { -1, N_ICMPSTAT, 1, 0, 166 icmp_stats, 0, "icmp" }, 167 { -1, N_IGMPSTAT, 1, 0, 168 igmp_stats, 0, "igmp" }, 169 { -1, -1, 0, 0, 170 0, 0, 0 } 171 }; 172 173 struct protox atalkprotox[] = { 174 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 175 ddp_stats, 0, "ddp" }, 176 { -1, -1, 0, 0, 177 0, 0 } 178 }; 179 180 struct protox nsprotox[] = { 181 { N_IDP, N_IDPSTAT, 1, nsprotopr, 182 idp_stats, 0, "idp" }, 183 { N_IDP, N_SPPSTAT, 1, nsprotopr, 184 spp_stats, 0, "spp" }, 185 { -1, N_NSERR, 1, 0, 186 nserr_stats, 0, "ns_err" }, 187 { -1, -1, 0, 0, 188 0, 0 } 189 }; 190 191 struct protox isoprotox[] = { 192 { ISO_TP, N_TPSTAT, 1, iso_protopr, 193 tp_stats, 0, "tp" }, 194 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 195 cltp_stats, 0, "cltp" }, 196 { -1, N_CLNPSTAT, 1, 0, 197 clnp_stats, 0, "clnp"}, 198 { -1, N_ESISSTAT, 1, 0, 199 esis_stats, 0, "esis"}, 200 { -1, -1, 0, 0, 201 0, 0, 0 } 202 }; 203 204 struct protox *protoprotox[] = { protox, atalkprotox, 205 nsprotox, isoprotox, NULL }; 206 207 int main __P((int, char *[])); 208 static void printproto __P((struct protox *, char *)); 209 static void usage __P((void)); 210 static struct protox *name2protox __P((char *)); 211 static struct protox *knownname __P((char *)); 212 213 kvm_t *kvmd; 214 215 int 216 main(argc, argv) 217 int argc; 218 char *argv[]; 219 { 220 extern char *optarg; 221 extern int optind; 222 struct protoent *p; 223 struct protox *tp; /* for printing cblocks & stats */ 224 int ch; 225 char *nlistf = NULL, *memf = NULL; 226 char buf[_POSIX2_LINE_MAX], *cp; 227 u_long pcbaddr; 228 gid_t egid = getegid(); 229 230 (void)setegid(getgid()); 231 tp = NULL; 232 af = AF_UNSPEC; 233 pcbaddr = 0; 234 235 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:nP:p:rstuw:")) != -1) 236 switch(ch) { 237 case 'A': 238 Aflag = 1; 239 break; 240 case 'a': 241 aflag = 1; 242 break; 243 case 'b': 244 bflag = 1; 245 break; 246 case 'd': 247 dflag = 1; 248 break; 249 case 'f': 250 if (strcmp(optarg, "ns") == 0) 251 af = AF_NS; 252 else if (strcmp(optarg, "inet") == 0) 253 af = AF_INET; 254 else if (strcmp(optarg, "unix") == 0) 255 af = AF_UNIX; 256 else if (strcmp(optarg, "iso") == 0) 257 af = AF_ISO; 258 else if (strcmp(optarg, "atalk") == 0) 259 af = AF_APPLETALK; 260 else 261 errx(1, "%s: unknown address family", 262 optarg); 263 break; 264 case 'g': 265 gflag = 1; 266 break; 267 case 'I': 268 iflag = 1; 269 interface = optarg; 270 break; 271 case 'i': 272 iflag = 1; 273 break; 274 case 'M': 275 memf = optarg; 276 break; 277 case 'm': 278 mflag = 1; 279 break; 280 case 'N': 281 nlistf = optarg; 282 break; 283 case 'n': 284 nflag = 1; 285 break; 286 case 'P': 287 pcbaddr = strtoul(optarg, &cp, 16); 288 if (*cp != '\0' || errno == ERANGE) 289 errx(1, "invalid PCB address %s", 290 optarg); 291 Pflag = 1; 292 break; 293 case 'p': 294 if ((tp = name2protox(optarg)) == NULL) 295 errx(1, "%s: unknown or uninstrumented protocol", 296 optarg); 297 pflag = 1; 298 break; 299 case 'r': 300 rflag = 1; 301 break; 302 case 's': 303 ++sflag; 304 break; 305 case 't': 306 tflag = 1; 307 break; 308 case 'u': 309 af = AF_UNIX; 310 break; 311 case 'w': 312 interval = atoi(optarg); 313 iflag = 1; 314 break; 315 case '?': 316 default: 317 usage(); 318 } 319 argv += optind; 320 argc -= optind; 321 322 #define BACKWARD_COMPATIBILITY 323 #ifdef BACKWARD_COMPATIBILITY 324 if (*argv) { 325 if (isdigit(**argv)) { 326 interval = atoi(*argv); 327 if (interval <= 0) 328 usage(); 329 ++argv; 330 iflag = 1; 331 } 332 if (*argv) { 333 nlistf = *argv; 334 if (*++argv) 335 memf = *argv; 336 } 337 } 338 #endif 339 340 /* 341 * Discard setgid privileges. If not the running kernel, we toss 342 * them away totally so that bad guys can't print interesting stuff 343 * from kernel memory, otherwise switch back to kmem for the 344 * duration of the kvm_openfiles() call. 345 */ 346 if (nlistf != NULL || memf != NULL) 347 (void)setgid(getgid()); 348 else 349 (void)setegid(egid); 350 351 if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, 352 buf)) == NULL) 353 errx(1, "%s", buf); 354 355 /* do this now anyway */ 356 if (nlistf == NULL && memf == NULL) 357 (void)setgid(getgid()); 358 359 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 360 if (nlistf) 361 errx(1, "%s: no namelist", nlistf); 362 else 363 errx(1, "no namelist"); 364 } 365 if (mflag) { 366 mbpr(nl[N_MBSTAT].n_value, nl[N_MSIZE].n_value, 367 nl[N_MCLBYTES].n_value); 368 exit(0); 369 } 370 if (Pflag) { 371 if (tp == NULL) { 372 /* Default to TCP. */ 373 tp = name2protox("tcp"); 374 } 375 if (tp->pr_dump) 376 (*tp->pr_dump)(pcbaddr); 377 else 378 printf("%s: no PCB dump routine\n", tp->pr_name); 379 exit(0); 380 } 381 if (pflag) { 382 if (tp->pr_stats) 383 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 384 tp->pr_name); 385 else 386 printf("%s: no stats routine\n", tp->pr_name); 387 exit(0); 388 } 389 /* 390 * Keep file descriptors open to avoid overhead 391 * of open/close on each call to get* routines. 392 */ 393 sethostent(1); 394 setnetent(1); 395 if (iflag) { 396 intpr(interval, nl[N_IFNET].n_value); 397 exit(0); 398 } 399 if (rflag) { 400 if (sflag) 401 rt_stats(nl[N_RTSTAT].n_value); 402 else 403 routepr(nl[N_RTREE].n_value); 404 exit(0); 405 } 406 if (gflag) { 407 if (sflag) 408 mrt_stats(nl[N_MRTPROTO].n_value, 409 nl[N_MRTSTAT].n_value); 410 else 411 mroutepr(nl[N_MRTPROTO].n_value, 412 nl[N_MFCHASHTBL].n_value, 413 nl[N_MFCHASH].n_value, 414 nl[N_VIFTABLE].n_value); 415 exit(0); 416 } 417 if (af == AF_INET || af == AF_UNSPEC) { 418 setprotoent(1); 419 setservent(1); 420 /* ugh, this is O(MN) ... why do we do this? */ 421 while ((p = getprotoent()) != NULL) { 422 for (tp = protox; tp->pr_name; tp++) 423 if (strcmp(tp->pr_name, p->p_name) == 0) 424 break; 425 if (tp->pr_name == 0 || tp->pr_wanted == 0) 426 continue; 427 printproto(tp, p->p_name); 428 } 429 endprotoent(); 430 } 431 if (af == AF_APPLETALK || af == AF_UNSPEC) 432 for (tp = atalkprotox; tp->pr_name; tp++) 433 printproto(tp, tp->pr_name); 434 if (af == AF_NS || af == AF_UNSPEC) 435 for (tp = nsprotox; tp->pr_name; tp++) 436 printproto(tp, tp->pr_name); 437 if (af == AF_ISO || af == AF_UNSPEC) 438 for (tp = isoprotox; tp->pr_name; tp++) 439 printproto(tp, tp->pr_name); 440 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 441 unixpr(nl[N_UNIXSW].n_value); 442 exit(0); 443 } 444 445 /* 446 * Print out protocol statistics or control blocks (per sflag). 447 * If the interface was not specifically requested, and the symbol 448 * is not in the namelist, ignore this one. 449 */ 450 static void 451 printproto(tp, name) 452 struct protox *tp; 453 char *name; 454 { 455 void (*pr) __P((u_long, char *)); 456 u_long off; 457 458 if (sflag) { 459 pr = tp->pr_stats; 460 off = nl[tp->pr_sindex].n_value; 461 } else { 462 pr = tp->pr_cblocks; 463 off = nl[tp->pr_index].n_value; 464 } 465 if (pr != NULL && (off || af != AF_UNSPEC)) 466 (*pr)(off, name); 467 } 468 469 /* 470 * Read kernel memory, return 0 on success. 471 */ 472 int 473 kread(addr, buf, size) 474 u_long addr; 475 char *buf; 476 int size; 477 { 478 479 if (kvm_read(kvmd, addr, buf, size) != size) { 480 warnx("%s\n", kvm_geterr(kvmd)); 481 return (-1); 482 } 483 return (0); 484 } 485 486 char * 487 plural(n) 488 int n; 489 { 490 491 return (n != 1 ? "s" : ""); 492 } 493 494 char * 495 plurales(n) 496 int n; 497 { 498 499 return (n != 1 ? "es" : ""); 500 } 501 502 /* 503 * Find the protox for the given "well-known" name. 504 */ 505 static struct protox * 506 knownname(name) 507 char *name; 508 { 509 struct protox **tpp, *tp; 510 511 for (tpp = protoprotox; *tpp; tpp++) 512 for (tp = *tpp; tp->pr_name; tp++) 513 if (strcmp(tp->pr_name, name) == 0) 514 return (tp); 515 return (NULL); 516 } 517 518 /* 519 * Find the protox corresponding to name. 520 */ 521 static struct protox * 522 name2protox(name) 523 char *name; 524 { 525 struct protox *tp; 526 char **alias; /* alias from p->aliases */ 527 struct protoent *p; 528 529 /* 530 * Try to find the name in the list of "well-known" names. If that 531 * fails, check if name is an alias for an Internet protocol. 532 */ 533 if ((tp = knownname(name)) != NULL) 534 return (tp); 535 536 setprotoent(1); /* make protocol lookup cheaper */ 537 while ((p = getprotoent()) != NULL) { 538 /* assert: name not same as p->name */ 539 for (alias = p->p_aliases; *alias; alias++) 540 if (strcmp(name, *alias) == 0) { 541 endprotoent(); 542 return (knownname(p->p_name)); 543 } 544 } 545 endprotoent(); 546 return (NULL); 547 } 548 549 static void 550 usage() 551 { 552 (void)fprintf(stderr, 553 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname); 554 (void)fprintf(stderr, 555 " %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", __progname); 556 (void)fprintf(stderr, 557 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", __progname); 558 (void)fprintf(stderr, 559 " %s [-M core] [-N system] [-p protocol]\n", __progname); 560 (void)fprintf(stderr, 561 " %s [-M core] [-N system] [-p protocol] -P pcbaddr\n", __progname); 562 exit(1); 563 } 564
Indexes created Sat Sep 27 14:09:57 GMT 2025